Reciprocating valve



April 14, 1936. Q BURNHAM 2,037,497

REC IPROCATING VALVE .Filed Aug. 24, 1934 2 Sheets-Sheet l AM`W/:1r/toman p y April 14, 1936. c. BURNHAM 2,037,497

RECIPROCATING VALVE y Filed Aug. 24, 1934 2 Sheets-Sheet 2 v n f,Patented Apr. 14,1936

3 Charles Burnham, Washington, D. C., assignor of V one-half to RalphBurnham, Pasadena, Calif.

` Applicaties August v24., 1934, serial No. '141,314V 3 (xmms.` (o1.asl-2 8) This invention relates to that type of valvel in whicha beveledvalve seats against a beveled seat, and the main object of thisinvention is to provide a simple land inexpensive means whereby,

when the valve is open, wire-'cutting of the seat is entirely avoided,"thereby maintaining the valve in'a. non-leakage condition fora greatlength of tima-as more fully' hereinafter set forth.

Referring to the drawings annexed, Fig. 1 is a vertical sectional viewof the valveshowing the valve closed;

Fig. 2 is a similar view showing the lvalve moved to a position where itis about ready to open;

Fig. 3 is a horizontal sectional view through the Fig. 4 is an explodedview of the'internalparts of the valveyand A y,

` Figs. 5 and 6 are views of the details hereinafter described. y

Figs. 'l 8, and 9 are views showing modifications.

Referring to the drawings by reference characters, Ill designates thevalve casing having the usual valve chamber provided with the usualdiaphragm II extending acrossits interior and provided with a thre'adedopening in alignment with an upstanding tube I2 havingcommuniea-` tionwith the'chamber I0. Nicely fitting the interior of the tubularextension I2 is a tube 4I3 whose upper part is interiorly threaded atI4, and

which, at apointjust below said threaded part I4, isprovided with anannular series of ports I5. Just below the ports I5, the .tube I3 isprovided with a shoulder I6 which faces downwardly and is adapted tobear upon the upper, horizontal face of the division wall I I. At apoint below the shoulder I6, the tube is reduced in diameter andexternally threaded for engagement with the internal threadt in theopening in the division wall vI I. At a point below this threadedportion of the cylinder I3, the cylinder isL again reduced, in diameterand provided with another annular series of ports I1, and below theports I'l the cylinder fits nicely the inner face of the wall of apocket I8 formed integral with the chamber IIJ and closed all around.The portions are such that when the cylinder I3 is screwed down into thedivision wall then the lower, reduced end ofv the cylinder I3 makes awater andsteam tight connection with the bottom wall of the pocket II bybeing pressed against a lead or other washer I9 resting upon the 4bottomof the pocket.

0n top ofthe tube I2 and clamped'by means oi' a ring nut 2li` is anannular iiange 2| .formed on the lower end lof the capl 22 which carriesa 56 stuffing-box and packing'gland o! the usual oonx and the body ofthe member 22 is provided with'a are closed, as shown in Fig. 1. Andwhen the p the inlet ports I1 are kept closed by the tubular struction,through which the usual rotatable, slidable valve ste1n`23' extends. Onits lower face the cap 22 is provided with anannular series of lugs 23which extend down into the tube I2 and between cooperating upstandinglugs 24, extend- 5 ing upwardly from the upper edge ofthe tube I3,

nut formation whereby by the useof a wrench applied to the nut formation25 the cap 22 may be utilized for screwing in or screwing. out. the 10cylinder I3, the ring nut 20 being Aof course first removed to permitthis operation. B ythus screwing down the cylinder` I3, thethreadedportion thereof engages the internal threads in the hole in the divisionwall II, shoulder I6 is pressed i5- hard against the division walljandthel extreme lower end of the cylinderis forced down `hard against thewasher or ring I9,` thus rendering the joints Water and steam tight. Thestem 23 at its lower, inner. end is provided 20 with a threadedenlargement 25' which fits the threaded interior of the seat-tubel andswivelly` connected to the lower end. ofthe stem is a valve disk 25,this swivel connection being ancomplished by a headed pin 2-1 projectingup- 25 wardly from the upper face of -\the disk 26 `and engaged in anopen notch 28 formed .in the bottom wall of a claw-like short cylinder29formed integral and depending from the lower side of the threadedenlargement 25. ,By means of this 30 connection between the valve disk26 and the stem, the valve disk and stem willhavean independent rotativeaction to thus insure the proper opening and closing of the valve disk.The valve diskl seats against a beveled seat 30 formed in theV 35seat-tube I3 at a point just below the ports I5. Formed integral withand dependingfroin the valve disk 26 is a cylindrical supplemental valveor secondary valve-tube 3| whose exterior nicely fits the interior faceof the lowerpart of the tube 40 I3 so as to be capable of opening aswell as closing the inlet ports I1, and at a point where this valve-tube3l joins the valve disk 26, thisv tube is provided with an annularseries of outlet ports 3 2, which, when this valve-tube is raised, 45puts the interior of the tube into communication with the outlet portsI5. The sizes `and positions kof the ports I1 and 32 and the length ofthe valve-tube 3l `are such that when the main valve 26' is seated boththese sets of ports 1504 main valve is moved upwardly to open position,

secondary valve 3| until the upper edge of the valve-tube (which formsedges 3|' I5.

of the ports 32) has been raised high enough to serve as a guard orfender for the valve seat 30, as shown in Fig. 2, thereby completelypreventing the out-rushing fluid from .wire-cutting said seat 30. Itwill be 'noted that the main valve cannot even be cracked without beingfully protected against wire-cutting.

In the modifications shown in Figs. 7 and 8, the cylinder I 3' is notthreaded into the passage through the diaphragm II, but instead isseated against a beveled seat therein, and instead of the interlockinglugs 23, 24 for rotating the cylinder I3 to screw it into place, Iextend the top edge of the cylinder I3 high enough to abut directlyagainst the cap 22 so that when the threaded ring is screwed down ontotube I2 the cylinder I3 will be jammed hard into place, with its beveledpart against the seat and diaphragm II and its lower end againstthewasher ring or disk I9. In this form of device, it is desirable to use awasher 35 between the member 22 and the upper end of the tube I3.

In this modification I show also a slight modified form of the mainvalve. In this form the head 36 of the combined supplemental valve andguard 3l is provided with a central threaded opening down through whichis screwed a pin 31 formed integral with the head 21, this threaded pinor extension 31 serving to clamp on top of the head 36 a flanged disk38, a seat washer 39 being clamped between these two parts 36 and 38.This seat washer 39 faces directly downward and is adapted to seatagainst an upwardly-fac'ing valve seat formed on the cylinder I3 insteadof the beveled valve seat shown inthe other figures. In thisconstruction as in the form shown in the other figures the distancebetween the lower edge of the valve cylinder 3I andthe bottom edges 3Iof its outlet ports is such that these bottom edges are raised to aprotective position with respect to the valve seats before the inletopenings I1 are opened. It is desirable that the lower end of the screwpin 31 shall be tapered in order to divide the up-going stream of fluidand divert it equally through the ports 32.

In Fig. 9 I illustrate one way of insuring a fluidtight joint betweenthe valve-tube 3I and its guide tube I3. For thispurpose, vI provide agroove in the inner face of the wall of the tube I3 and place therein asplit piston ring 40 of common form, this ring being of course solocated that in all adjustments of the valve tube,

the tube will lap this ring. With a packing ring of this sort, the mainvalve 26 may be cracked without danger of fluid leaking up behind theguard to the valve seat 30, thus insuring against wire-cutting of theseat even when the main valve is cracked to the most minute degree. Forconvenience in assembling, the lower part I3 of the tube I 3 may be madeseparate from the main part of the tube and screwed into its lower endto thus form an annular cavity for the packing ring, and also the topinner corner of the packing ring and the lower outer corner of thetubular part 3| may be slightly beveled to enable the Avalve to bereadily inserted down into its guide tube i3 when the parts areassembled.

I claim:

1. In combination, a valve casing having an upstanding tube exteriorlythreaded, a hollow cylinder slidingly fitting down into said tube andprovided with a valve seat surrounding the passage through the casingand internal threads and having an opening communicating with the outletof the casing, a ring nut screwed on the threaded part of said tube, acap having a flange which is clamped on the top end of said tube by :aidring nut, said cap having a nut formation above the flange adapted forthe use of a wrench, interlocking lugs between said cap and the upperend of said cylinder, and a slidable-rotatable stem extending downthrough said cap and provided with a threaded member for engaging theinternal threads of said cylinder and a valve.

2. In combination. a valve casing having a passage and a valve-seatmember therein and also a closed cylindrical portion below said member,a

cylinder supported on and attached t0 said member, the lower end of thiscylinder depending into and fitting the interior of said cylindricalportion of the casing, the part of this cylinder between saidcylindrical portion and the valve-seat being provi-ded with an inletport, a main valve and means for moving it toward and from said seat,this main valve. being provided with a depending cylindricalsupplemental valve fitting into the aforesaid cylinder and having anoutlet port at its upper end and its lower end open.

3. The structure in accordance with claim 2, the lower end of saidcylinder being open and a packing being employed between said lower endof the cylinder and the bottom of the closed cylindrical portion of thecasing.

' CHARLES BURNHAM.

